Thanks to everyone who replied. I appreciate your kind words very much.
This organ is a tracker instrument with two manuals and 24 stops (without pedals) and its specification can be found here.
For the people who would like to hear more music performed on this interesting intrument, I would like to share the Prelude from my Organ Mass for the 30th Sunday which I played in Tytuvenai.
By the way, after sharing the score and the details of it, a few people have asked me about the advice how to play it on the organ without pedals because the span between the bass and the tenor sometimes is more than an octave and it is quite difficult to reach the tenths and the twelths for the organists with smaller hands.
Probably the best advice would be to raise some bass notes one octave higher. This might help in such situation. I don't have very large hands but by doing so my performance in Tytuvenai went well.
By the way, Woody suggested that I should start the funding project for the restoration of this organ on Kickstarter. It's a wonderful idea, of course, but I'm afraid I'm not qualified because the Kickstarter currently is for projects which are US, UK, Canada, Australia, and New Zealand based.
If you live in one of these countries and have a project in mind but you lack funding, check out the Kickstarter. It's a fantastic way to croud-fund any kind of project (including organ restoration or building a new organ) you can imagine.